Sparking device for internal-combustion engines.



No. 847,894. i PATENTED MAR. 19, 190?.

E. F. BRADLEY. SPAEKING DEVICE FOR-INTERNAL COMBUSTIONBNGINES.

APPL'IOATIOI! FILED IEB. 2, 1906. I

QSHEETS-SHEET 1.

No. 847,894. PATENTED MAR. 19, 1907.

B. P. BRADLEY. SPARKING DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED FEB. 2, 1906.

2 SHEETS-SHEET 2.

v I 5 55 l J5 Z!!! Mazdcomplete system with the connections. Fig.

EDWARD FRANKLIN BRADLEY, OF TUFNELL BARK, LONDON, ENGLAND.

SPARKlNG DEVICE FOR lNTERNAL-OOMBUSTEQN ENGENE$5= Specification of Letters Patent.

- Patented March 19, 1907.

Application filed February 2,1906. Serial No. 299,159.

To (ti-Z whom it may concern: 5 :5 Be it known that I, EDWARD FRANKLIN BRADLEY, engineer, a citizen of the United 1 States of America, residing at Thel'live, Anson Road, Tufnell Park, in the county of London, England, have invented certain new and useful Improvements in Sparki ing Devices for Internal-Combustion Engines; and I do hereby declare the following i to be a full, clear, and exact description of 3 the invention, such as will -enable others skilled in the art to which it appertains to make and use the same. My invention relates to improvements in sparking-devices, and is specially applicable for firing-the charges in internal-combustion engines possessing a plurality of explosioncylinders. its chief features are that only a 5 single spark is produced for ignition, making I the firing more capable of precision of control and adding to the efiiciency of the engine, i while the battery energy is economized. I carry my invention into efiect by the employinent of a specially-designed electro magnetic switch which is very rapid and certain in action, operating, BSIG'dQQS, both by repulsion and attraction. The current from any convenient source oi'electrical energy is supplied to the mechanism hereinafter described by a mechanically-operated circuit closing device attached to or actuated by any moving or rotary part of the engine that en ergizes an induction-coil to which the switch mechanism is fitted. As usual, the induction-coil has its primary winding connected. up in the main circuit and the secondary coil is connected with a distributor with the ob ject of producing a spark in successive cylinders, the moving part of the said distributer being driven or actuated by any convenient moving part of the internal-combustion engine.

To enable, however, my invention to be more fully understood, I will now' proceed to describe same, special reference being made to the accompanying drawings, in which Figure 1 is a diagrammatic view of the 2 is. a front view of the actual apparatus. Fig. 3 is a side view of Fig. 2. big. 4 is a plan.

Referring to the drawings, 1 is the core of the induction-coil 1. A conducting-wire 2 is led from the primary winding of inductioncoil to contact-brushb', engaging with rotary contact-plate 4, (see Fig. 1,) which latter is,

f attached to any convenient part of the 9H",

gins. This (1011 is in series w th spring-plate and platinum contacts 6 and 7, by means of conducting-wire 2 with switch 8 to, say, pole of battery 9. i

The other pole of battery 9 is connected.

by wire 2 to a second brush 3, placed adja--.,

cent to the other brush 3. 1 bridge a corn denser 1 l of convenient capacity between the make-and-break contacts 6 and 7, as shown 4 diagrammatically in Fig. '1. In this primary conducting-circuit and in shunt between the platinum contact 6 and brush. 3, as shown, T

place a comparatively high resistance shunt coil 12 by conducting-wires 13.

'lhe shunt-coil energizes the electromagnet 14, the upper pole 15 of which is bent over and down, as shown in Figs. 1 and 2,

leaving but a small gap between itself and the opposite pole-piece 16. Between the pole-pieces 15 and if) of electromagnet i4: is placed the tongue or armature 12', of soft iron. This armature is pivoted at .18 and lies immediately over the core 1 of inductioncoil 1*. I

A spring 29 tends to keep the armature. off the pole of magnet 1. To this armature is riveted ahook 21,which is arranged to catch and pull down the spring contact-plate 5 (screwed and held at B it when under the influence of electromagnet 1, formed by induction-coil 1* and. shunt-electromagnet l e, and atthe extremity or the armature l. rivet a brass tip 22 on either side to prevent this sticking between the electromagnebpoles.

The rotary contachplate formed of any convenient insulating material, such as ebonite, and has contact-plates 23 attached to its periphery or face. These contact-plates are insulatedfrom each other and correspond in number with the number of sparking plugs requited and are mounted on shaft 24, driven by any convenient part of the. engine.

Any system of distributing current to the sparking plugs may be employed; but in the example shown the contact-arm 25 on shait 24L reeves over stationary plate 26, containirig contact-studs 27 27? 217F127, which are in connection with sparking plugs 29 29 The sparking plugs are connected by a the primary of induotion-ooii winding 1,

arm 25'. he contact-studsof the piste 126 i are olsoconncotod by suitable Wires with the sparking plugs. In construction (see Figs. 2, 3; and, 1) i prefer to mount the coil anrl'contlenscr in a i Wooden box 30,,os usual, the moire-sink break apparatus being on the corc'fii,

shown, and the platinum unmet-screw? I prefer to inalie adjustable. For this rhirpose the sorewis preferably made with a hole- '32 for a "wrench-bar and is threaded tl'u'o'uglr the body of the split brass nut 33, screwed-to eleotroniagnet pole-piece '15.. A. tighteningscrew 34, threuded'tlu ough the split ends or the nut, enables me to ii): the contact-screw permanently, this being needful owing to the vibration of the car when the sparking device is attached to motor-vehicles.

The orrnoture is hinged on u hard-steel pivot 18 between brackets 36 on brass plate 37. I

The operation of my invention is as follows: The switch 8 in primary circuit is closed and the contuct-hrushcs 3 just enter into engagement with the plate 23. The current passes from the battery 9, through the switch 8, through the platinum contacts 6 and? on spring-plate 5,21-nd thence through tiL'ough i intact-piece 23, by ctnductor 2, and thence back tothe battery 9. 'ihe in duction-coil primary Winding is so or mieotcd that its polarity is opposite to that of the lower pole-piece 16 of the shunt-coil 12. The pitssstge of the current from the battery also energizes this shunt, and the combined ell'ect of the induction-coil, together with the etl'ect of the shunt-coil, smartly pulls down the soft iron armature 17 against the notion of I the sprin The brass hook 2? on armw i.

. current continuing to puss Quit, allowing the zirniett e 31or1nal position, the extra current primary oi iIltluC-UOIPQ The contoc t-arm 26 is so arranged thztt u stationary Contact 6 orul o ranged between the two pole-pieoos o ture i7 with bone center on sprnrgmiuto breaking; the on t q tween the platinum contacts holds down the, armature ui ti has This hre I being. condenser whiclubemgbridged he the contacts 6 and 7, also prcvenls spurring. flu-n one of the contact-pieces 23 on coninurtutor l is in contact with the two 3 the said contact-arm is in contact with onooi the cow tact-pieces 27 27 27* 2? musing 21. spark-m the plug on breaking the primary circuit. 7

I ohrinfl i I The combination, with on inrluoiion-coii, :t circuit maker and breaker, 21- 'zrt o1 having it contact 7 include n u 1. all the aforesaid parts; at condenser bridged between the said spring i o i h "l tact 6, on elootronmgnet arr: circuit with the said coil and to pivoted armature for the duction'coil having its said eleotromognet, and a hook on the said armature mid e 6 free end portion of the suit sprii- In testimony whereof 1 e33)? in presence of two Witnesses.

' Wlitnesses:

HUBERT .hiURRAY oe mas, Airmen N'o'rrrim. 

